Chapter 5 Vocab Flashcards
Mitosis
The division of the cell nucleus and it’s contents
Cell cycle
The regular pattern of growth, DNA replication, and cell division that occurs in eukaryotic cells
Cytokinesis
Process that divides the cell cytoplasm
Chromosome
Long, continuous thread of DNA that consists of numerous genes and regulatory information
Histones
Protein that organizes chromosomes and around which DNA wraps
Chromatin
Loose combination of DNA and chromosomes that is present during interphase
Chromatid
One half of a duplicated chromosome
Centromere
Region of the condensed chromosome that looks pinched
Telomere
Repeating nucleotide at the ends of DNA molecules that do not form genes and help prevent the loss of genes
Prophase
First phase of mitosis when chromatin condenses, the nuclear envelope breaks down, the nucleolus disappears, and the centrisomes and centrioles migrate to opposite sides of the cell
Metaphase
Second phase of mitosis when spindle fibers align the chromosomes along the cell equator
Anaphase
Third phase of mitosis during which chromatids separate and are pulled to opposite sides of the cell
Telophase
A complete set of identical chromosomes is positioned at each pole of the cell. The nuclear membranes start to form, the chromosomes begin to uncoil, and the spindle fibers fall apart